by almost 11 points, on average, on a salt-restricted diet versus their usual diet. They also flushed out a liter of water (about one-quart) from their bodies, on average, by slashing salt in their diets, researchers said.

Having high blood pressure and retaining excess salt and water in the body stresses the heart and blood vessels, explained lead author Dr. Rajiv Saran of the University of Michigan.

For kidney disease patients, high blood pressure (or “hypertension”) and excess fluid in the body can be a toxic combination. “They die predominantly of cardiovascular disease,” said Saran, a professor of internal medicine and epidemiology in the nephrology division.

Yet doctors rarely have time or make time to counsel each patient about salt-restricted diets, he said.

Saran and co-investigators wondered whether having trained dietitians talk to patients with chronic kidney disease by phone or in person about ways to lower daily sodium intake would make a difference. Read More